The histogram shows information about the speed of cars passing a checkpoint.

40 cars have a speed between 40 and 50 mph.
Work out an estimate for the number of cars which have a speed of more than 65 mph.
Explain why your answer to part a is only an estimate.
24 exam-style questions on AQA GCSE Maths Histograms. Each one has a worked solution and a mark scheme showing where the marks go.